Machine for cutting textile fabrics



March 6, I928. 1,661,765

J. LElPER MACHINE FOR CUTTING TEXTILE FABRICS Filed March 5. 1926 Patented Mar. 6, 1928.

UNITED STATES PATENT OFFICE. I

JOHN LEIPER, or new YORK MILLS, NEW YORK, Assrenon TO NEW YORK MILLS eon POBATION, or new YORK MILLS, NEW YORK, A- conronarron or new roan.

MACHINE FOR CUTTING TEXTILE FABRICS.

Application filed March 5, 192a. sci-mine. 92,422.

My invention relates to improvements in machines for cutting float threads of textile fabrics. In the manufacture of textile fabrics there are many varieties of cloth which have what is called float threads extending across the face. of the cloth, and which are bound to the base fabric at intervals and subsequently cut, sometimes to form pile and sometimes to form figures, and in any event the float threads are severed, and in some styles of cloth portions of the float threads are cut away and removed. In this process of manufacture which is common and well known in the trade, and which is especially so in the manufacture of pile fabrics, it is desirable to have the dust, lint, and loose threads removed to prevent the debris from going into the surrounding air. My invention is intended to attain this and other objects, as will appear in the description which follows.

In carrying out these ideas I arrange an exhaust pipe preferably in advance of the cutters and adjustable with relation thereto, shape the mouth of the exhaust pipe so asto extend across the web of the fabric, and also give it such a shape that the dust, lint, and loose threads will pass from all parts of the surface to the exhaust pipe and so be carried away. This arrangement enables the operation to be cleanly and nicely performed, and it exposes the face of the fabric to the operator so that he can readily see that the cutters are doing their work properly. My invention is applicable to any usual type of cutting machine for the purpose specified, and I prefer to have it adjustable so that it may be brought into the correct position with relation to the cloth which is being operated on. All of which will appear more clearly from the specification and drawings.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar reference characters indicate corresponding parts in all the views. Figure 1 is a broken sectional elevation of my improvement as applied to a somewhat conventional cutting machine, and I Figure 2 is a broken sectional elevation at right angles to the view taken in Figure 1.

In the drawings I have shown a conventional frame 10 carrying the tension rolls 11 and tension bar 12, which can obviously be arranged in any usual or preferred manner, and the cloth line 13 extends over these rolls and tension bar, over the straightedge 14, and through the stop motion 14 in the usual manner.

I have shown my improvements in connection with rotary cutters 15 which are carried by a shaft 16 extending transversely across the machine and supported and driven in any usual or preferred way. These rotary cutters or knives 15 are spaced apart by spacing blocks 17 in a well known manner, and thespacing may be regular or irregular. as desired, this being governed by the thickness of the several spacing blocks 17. These knives or cutters 15 are disposed so asto cut through the float threads of the cloth 13 but not through the body of the cloth. I have not shown the fabric in detaihbecause thisvaries to a great extent, and anyone in the trade understands the practice of throwing float threads across the faceof the fabric. The foregoing structure is more or less conventional, and my invention is not limited to this structure, and the type of knives or cutters used can be other than that illustrated. I

The lint, dust, and severed float threads are carried away through an exhaust pipe 16 which is arranged preferably inclose 'prox-j imity to the cutters or knives 15, and also preferably in advance of the knives. I provide this with a widened lower portion having a mouth 18 extendingentirely across the cloth, and opening from the bottom and from the side next the cutters or knives 15, Y

leaving the back 19 of the mouth extending across and in close proximity to the cloth. It is desirable to have the mouth of the pipe adjustable back and forth with relation to the cutters or knives so that the desired effect can be produced, and this adjustment can be made in any usual or preferred way. For example, I have shown the neck of the pipe 16 provided with a collar 20 from which extends a bolt or screw 21 having a wing nut 22 thereon, and the bolt extends through the flange 23 of the curved bracket 24 which is fast to the frame 10 or other support. Thus by loosening the nut 22 the mouth of the pipe 16 can be moved back and I forth with relation to the cutters or knives 15, and the nut can-then be tightened so as to fixthe position of the mouth of the exhaust pipe.

It will be seen by reference to Figural that the lower end of the pipe 16 can be adjusted with relation to the cutters so that the lint, dust, and loose threads will be drawn in through the mouth 18 an upward through the pipe 16'. The low-lying back 19 prevents the cloth from being raised to any reat extent, and it leaves the face of the c loth clean so that the operator can readily detect any defect in the knife or knives. In practice the mouth 18 of the exhaust pipe is brought very close to the cutters 15, but I have shown it spaced somewhat to avoid confusion in the drawings. It will also be noted that the cloth is kept substantially straight and level at the point where the cutters sever the float threads and where the suction pipe is applied.

It will be seen that the arrangement is very simple, and while I have shown a particular means for supporting and adjusting it, this way is only incidental, as it will be evident to anyone familiar with such machinery that the pipe 16 can be supported in many ways without afiecting the invention. It isimportant, however, to have the mouth of the exhaust pipe extend across the cloth, and have the opening on the side as well as bottom of the exhaust pipe so that the best effect can be had on the float threads, and the removal of the extraneous matter from the cloth facilitated.

It will be noted that by having the mouth of the pipe 16 spaced apart from the cutters, the latter are left free for inspection and adjustment. It will also be noted that the mouth or opening 18 is at an acute angle to theplane of travel of the cloth and the wall 19 extends down into close proximity to the cloth, the wall saving the cloth from moving vertically under the effect of the exhaust pipe. The loose threads are, there fore, efficiently removed from the cloth, but the cloth itself is not disturbed.

I claim 1. The combination with the cloth carrying means and the cutters disposed to act on the face of the cloth while the latter held flat and straight, of an exhaust pipe having a mouth portion extending entirely across the cloth and spaced apart from the cutters, the back wall of the exhaust mouth lying in close proximity to the fabric. and the opening on'the side next to the cutters.

2. The combination with the cloth carrying means and the cutters disposed to act on the face of the fabric while the latter is held fiat and straight, of an exhaust pipe having a mouth portion extending across the cloth and spaced apart from the cutters, the said mouthportion having its opening disposed at an acute angle to the plane of travel of the cloth.

3. The combination with the: cloth carry ing means and the cutters disposed lo act on the face of the cloth while the latter is held flat and straight, of an exhaust pipe having a mouth portion extending across the cloth and spaced apart from the cutters. said mouth portion having its back wall lying in close proximity to the cloth and its opening on a side next the cutters, and means for adjusting the month portion back and forth with relation to the cutters.

In testimony whereof, I have signed my name to this specification this 1st day of March, 1926.

JOHN LEIPElt 

